Tetra HT10 Submersible Aquarium Heater & Electronic Thermostat, 50-watt

Skip image gallery
Slide 1 of 6
$15.27 (-19%) Chewy Price
$18.89 List Price
Promo, New Customers Only: Spend $49+, Get $20 eGift Card + Free Shipping with code: WELCOME
In Stock
FREE 1-3 day delivery on first-time orders over $35
Free 365-day returns

Pay in 4 interest-free payments on purchases of $30-$1,500. .

About This Item

Details

  • Submersible heater that can be installed vertically or horizontally.
  • Low voltage thermostat maintains water at 78°F.
  • Features red/green indicator lights to show when the heater is heating or on standby.
  • For use with 2-10-gallon aquariums.
  • Easy to conceal behind plants or other décor.

Frequently bought together

Questions & Answers

6 Customer Questions

Once water is up to temp and light is green, do I need to unplug the heater?

Answer by Chewy • Nov 17, 2020
Once the water is up to temperature, it does not need to be unplugged as the heater will maintain the water at 78°F.

Can this be used in a plastic tank?

Answer by Chewy • Nov 12, 2021
This thermostat can be used in a plastic tank as long as the tank is the proper size for it, it is fully submerged at all times, vertical and not touching the gravel or décor.

How long is the heater cord, please?

Answer by Chewy • Nov 01, 2023
This cord is 6 feet long.

How long is the heater?

Answer by Chewy • Apr 04, 2021
This heater is approximately 7 inches in Length.
Reviews
Write a Review
4.1
Rated 4.1 out of 5 stars
128 Ratings
Terms & Conditions

76 Customer Reviews

Rated 4 out of 5 stars
By Allyse on Jan 28, 2026

Works well, just a little warm

It tends to heat the water a little warmer than I like to keep it for my catfish. It doesn't have an adjustable thermostat, so I put it on a smart plug and just

It tends to heat the water a little warmer than I like to keep it for my catfish. It doesn't have an adjustable thermostat, so I put it on a smart plug and just run it overnight. The fish seem happy.

Rated 5 out of 5 stars
By Kristen on Jan 12, 2026

Works great for small tank.

We use it for our female betta's 5 gallon tank and its been doing a great job. We've had it for 7 months now.

We use it for our female betta's 5 gallon tank and its been doing a great job. We've had it for 7 months now.

Rated 5 out of 5 stars
By Shelbye on Oct 29, 2025

How fast it heated up.

Very pleased with this product. I was reluctant on getting ir first because of the bad things ive heard from the brand but I amd rather pleased with how fast it

Very pleased with this product. I was reluctant on getting ir first because of the bad things ive heard from the brand but I amd rather pleased with how fast it heated up my tank.

Rated 4 out of 5 stars
By Sharon on Dec 31, 2025

Set it

You just put it in the tank and it’s all set no adjustments needed

You just put it in the tank and it’s all set no adjustments needed

Rated 5 out of 5 stars
By James on Oct 14, 2025

Heater

Works great in my daughters 10 gallon tank

Works great in my daughters 10 gallon tank

Rated 3 out of 5 stars
By Chad on Apr 16, 2025

I guess it works...

Doesn't really maintain temperature. Constantly heating a tank size within it specifications.

Doesn't really maintain temperature. Constantly heating a tank size within it specifications.

Rated 4 out of 5 stars
By Jason on Dec 21, 2024

The size

It works well. The only drawback is the inability to control the temperature. It is preset.

It works well. The only drawback is the inability to control the temperature. It is preset.

Rated 5 out of 5 stars
By Calvin on Jan 22, 2025

Nice heater

So far, it is working good. Keeps the tank temperature as it should.

So far, it is working good. Keeps the tank temperature as it should.

Rated 1 out of 5 stars
By Christina on Dec 2, 2024

Killed my fish

This heater killed two fish the first night. They were stuck to it and there is no thermostat on it.

This heater killed two fish the first night. They were stuck to it and there is no thermostat on it.

Rated 5 out of 5 stars
By Susan on Dec 27, 2024

As described

Appreciate the reminder on placement for water changes without removing it

Appreciate the reminder on placement for water changes without removing it